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Borrowings - Additional Information (Detail) $ in Millions, $ in Millions	1 Months Ended				12 Months Ended
	Apr. 30, 2020 USD ($)	Feb. 29, 2020 USD ($)	Dec. 31, 2019 AUD ($)	Nov. 30, 2019 AUD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 AUD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Apr. 30, 2020 AUD ($)	Dec. 31, 2019 USD ($) business_day	Dec. 31, 2019 AUD ($) business_day
Debt Instrument [Line Items]
Borrowings					$ 926		$ 681	$ 95
Total borrowings					$ 1,259		$ 1,453
Interest coverage ratio	300.00%
Share Holders Loan \| Foxtel
Debt Instrument [Line Items]
Proceeds from shareholder loans				$ 200.0
Credit facility 2019 \| Foxtel
Debt Instrument [Line Items]
Maximum amount of credit facility				610.0
Foxtel \| Fiscal Year 2021
Debt Instrument [Line Items]
Operating income leverage ratio					350.00%	350.00%
Foxtel \| Fiscal Year 2022
Debt Instrument [Line Items]
Operating income leverage ratio					325.00%	325.00%
Foxtel \| Share Holders Loan
Debt Instrument [Line Items]
Proceeds from shareholder loans				200.0
Foxtel \| Credit facility 2019
Debt Instrument [Line Items]
Unused capacity commitment fee percentage					45.00%	45.00%
Foxtel \| Credit facility 2019 \| Fiscal Year 2020
Debt Instrument [Line Items]
Operating income leverage ratio					375.00%	375.00%
Foxtel \| Revolving Credit Facility
Debt Instrument [Line Items]
Repayment of revolving credit facility				1,100.0
Foxtel \| Telstra subordinated loan facility 2020
Debt Instrument [Line Items]
Telstras ownership percentage of Foxtel		35.00%
Foxtel \| Telstra subordinated loan facility 2020 \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing		7.75%
Unsecured revolving credit facility available amount		$ 170
Foxtel \| Term loan facility 2019
Debt Instrument [Line Items]
Proceeds from long-term lines of credit						$ 250.0
Interest coverage ratio					350.00%	350.00%
REA Group
Debt Instrument [Line Items]
Operating income leverage ratio	325.00%
Restricted cash									$ 50.0
REA Group \| Credit facility 2019
Debt Instrument [Line Items]
Unused borrowing capacity fee percentage	50.00%
Minimum \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing					2.00%	2.00%
Minimum \| Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Interest coverage ratio					1.00%	1.00%
Net leverage ratio					1.00%
Minimum \| Foxtel \| Credit facility 2019 \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing					2.00%	2.00%
Minimum \| REA Group \| Credit facility 2019 \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing	0.85%
Maximum \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing					3.75%	3.75%
Maximum \| Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Interest coverage ratio					3.00%	3.00%
Net leverage ratio					3.00%
Maximum \| Foxtel \| Credit facility 2019 \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing					3.75%	3.75%
Maximum \| REA Group
Debt Instrument [Line Items]
Operating income leverage ratio	400.00%
Maximum \| REA Group \| Credit facility 2019 \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing	2.00%
Credit Agreement \| Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Unsecured revolving credit facility available amount										$ 650
Facility Due December 2019 \| REA Group
Debt Instrument [Line Items]
Unused capacity commitment fee percentage			40.00%
Facility Due December 2019 \| Minimum \| REA Group \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing			0.85%
Facility Due December 2019 \| Maximum \| REA Group
Debt Instrument [Line Items]
Operating income leverage ratio	325.00%
Facility Due December 2019 \| Maximum \| REA Group \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing			1.30%
2019 Credit Facility and 2019 Term Loan Facility
Debt Instrument [Line Items]
Borrowings				1,100.0
Facility due December 2019 \| REA Group
Debt Instrument [Line Items]
Repayment of revolving credit facility			$ 240.0
Proceeds from issuance of other long-term debt			$ 170.0
Maximum amount of credit facility											$ 480.0
News Corp 2019 Credit Agreement \| Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Maximum amount of credit facility										750
Letters of credit sublimit under credit facility										$ 100
Number of extension options \| business_day										2	2
Extension term			1 year
News Corp 2019 Credit Agreement \| Unsecured Revolving Credit Facility \| Revised Line Of Credit Facility
Debt Instrument [Line Items]
Unused capacity commitment fee percentage					0.20%	0.20%
Maximum amount of credit facility										$ 1,000
News Corp 2019 Credit Agreement \| Unsecured Revolving Credit Facility \| Base Rate \| Revised Line Of Credit Facility
Debt Instrument [Line Items]
Applicable margin for borrowing					0.375%	0.375%
News Corp 2019 Credit Agreement \| Unsecured Revolving Credit Facility \| Eurodollar \| Revised Line Of Credit Facility
Debt Instrument [Line Items]
Applicable margin for borrowing					1.375%	1.375%
Overdraft Facility 2021
Debt Instrument [Line Items]
Borrowings discount rate	4.22%
Overdraft Facility 2021 \| REA Group
Debt Instrument [Line Items]
Maximum amount of credit facility	$ 20								20.0
Annual facility fee	0.15%
Working capital facility April 2020 \| REA Group
Debt Instrument [Line Items]
Total borrowings									$ 148.5
Unused borrowing capacity fee percentage	50.00%
Working capital facility April 2020 \| Minimum \| REA Group \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing	2.00%
Working capital facility April 2020 \| Maximum \| REA Group \| Australian BBSY
Debt Instrument [Line Items]
Applicable margin for borrowing	2.75%
Working capital facility 2017 \| Foxtel
Debt Instrument [Line Items]
Working capital facility capacity				100.0
Credit facility 2016
Debt Instrument [Line Items]
Repayment of revolving credit facility				400.0
Credit facility 2015 \| Foxtel
Debt Instrument [Line Items]
Repayment of revolving credit facility				400.0
Credit facility 2014 \| Foxtel
Debt Instrument [Line Items]
Repayment of revolving credit facility				200.0
Working capital facility 2017 amended \| Foxtel
Debt Instrument [Line Items]
Maximum amount of credit facility				$ 100.0
Working capital facility 2017 amended \| Foxtel
Debt Instrument [Line Items]
Debt instrument term				3 years
Working capital facility amended capacity				$ 40.0